BECERRA, Diego, Spanish navigator, d. in 1533. He was an officer in the army of Cortés, conqueror of Mexico. When the ship “Concepcion” was built at Tehuantepec by order of Cortés, Becerra was given command of her, and went, 30 Nov., 1533, to explore the coasts of the southern sea. A short time after he had begun the work his pilot treacherously assassinated him.